闽东滨海湿地土壤有机碳含量分布格局  

Distribution Pattern of Soil Organic Carbon Contents in the Coastal Wetlands in Eastern Fujian

作　　者：廖小娟[1] 何东进[1] 王韧 蔡金标 苏少川[1] 张中瑞[1] 肖石红[1] 陈志文[1] 黄鹏[1] 

机构地区：[1]福建农林大学林学院,福建福州350002 [2]福鼎市林业局,福建福鼎355200 [3]霞浦县林业局,福建霞浦355100

出　　处：《湿地科学》2013年第2期192-197,共6页Wetland Science

基　　金：福建省科技厅重点项目(2009N0009);国家自然科学基金项目(30870435);国家教育部博士科学点基金项目(20103515110005);福建省自然科学基金项目(2011J01071);国家级大学生创新性实验计划项目(101038907)资助

摘　　要：为了揭示闽东滨海湿地土壤有机碳的分布格局,对闽东滨海不同类型湿地土壤有机碳含量进行了测定和分析。结果表明,不同湿地类型0～60cm土壤有机碳含量介于5.34～12.94g/kg之间,平均值为7.78g/kg。其中,红树林的有机碳含量为12.94g/kg;稻田的有机碳含量为8.67g/kg;水产养殖场的有机碳含量为6.64g/kg;水域的有机碳含量为5.81g/kg;潮间裸滩的有机碳含量为5.33g/kg。土壤有机碳含量垂直分布格局为裸滩和水域由表及里逐渐减少;稻田呈现先减小后增大的趋势;而红树林与水产养殖场的土壤有机碳含量都在20～40cm土层达到最大值。闽东滨海湿地土壤有机碳水平分布格局为霞浦县最大,蕉城区次之,福鼎市最低。不同湿地类型土壤有机碳储量也不同,红树林的有机碳储量为5.66kt/km2;稻田的有机碳储量为3.42kt/km2;水产养殖场的有机碳储量为2.75kt/km2;水域的有机碳储量为2.69kt/km2;潮间裸滩的有机碳储量为2.11kt/km2。土壤有机碳含量与全氮含量、碳氮比呈显著正相关(p<0.01),与pH呈显著负相关(p<0.01),表明在土壤中的氮主要以有机氮的形态存在。In this paper, in order to clarify the distribution pattern of soil organic carbon in Eastern Fujian coastal wetland, the content of soil organic carbon in different kinds of the coastal wetlands in Eastern Fujian were determined and analysed. The results showed that the content of soil organic carbon ranged from 5.12-13.43 g/kg, with an average of 7.77 g/kg, in different types of wetlands. According to the content of soil organic carbon in the surface of the different wetlands, the soil organic carbon content of the mangrove was 12.94 g/kg, the paddy was 8.67 g/kg, the aquafarm was 6.64 g/kg, the water area was 5.81 g/kg and the mudflats was 5.33 g/kg. The soil organic carbon in the vertical profiles had a tendency of the mudflats and the water area wetland showed a decreasing trend from the surface to the bottom; and the paddy decreased at first and then increased; the mangrove and the aquafarm were highest in the 20-40 cm soil layer. The horizontal changing trend of soil organic carbon content in Eastern Fujian coastal wetland presented that Xiapu county was the highest, and Fuding City was the lowest. The storage of soil organic carbon in different wetlands were different. The storage of soil organic carbon of the mangrove was 5.66 kt/km2, the paddy was 3.42 kt/km2, the aquafarm was 2.75 kt/km2, the water area was 2.69 kt/km2 and the mudflats was 2.11 kt/km2. The soil organic carbon was significantly and positively correlated（p0.01） with total nitrogen and C/N ratio, while it was significantly but negatively correlated（p0.01）with pH, suggesting a large reserve of organic nitrogen in total nitrogen.

关 键 词：滨海湿地 土壤有机碳 分布格局 

分 类 号：S153[农业科学—土壤学]